Yalea Krzemiński, 2004

BLAGODEROV, VLADIMIR, GRIMALDI, DAVID A. & FRASER, NICHOLAS C., 2007, How Time Flies for Flies: Diverse Diptera from the Triassic of Virginia and Early Radiation of the Order, American Museum Novitates 3572, pp. 1-40 : 12-14

Genus Yalea Krzemiński, 2004

Yala Krzemiński, 1992: 44 . Type species: Yala argentata Krzemiński, 1992 , monotypic, by original designation (preoccupied by Yala Chu, 1979 [ Geometridae ]).

Yalea Krzemiński, 2004: 229 . Replacement name.

DIAGNOSIS: R 4 base proximal to r-m, section of M 2 proximal to m-m and section of M 3 proximal to m-m are nearly equal, with length 0.3–0.5X that of discal cell.

INCLUDED SPECIES: Yalea argentata (Krzemiński) (figs. 5c, 10b) and Y. rectimedia Blagoderov and Grimaldi , new species.

Yalea rectimedia Blagoderov and Grimaldi , new species figures 5d, 10a

DIAGNOSIS: Nearly 0.7X smaller than Yalea argentata . Sc shorter, ends at the level of R 2+3 base (vs. slightly distad). M 3 and M 4 parallel (vs. slightly divergent and curved). R 2+3 2X the length of stem of RS (vs. 1.5X the length). Length of M 1+2 stem equal to section of M 2 proximal to m-m (vs. 1.5X the length).

DESCRIPTION: Female. Measurements: body 5 3.8 mm, wing 5 2.2 mm. Scape and pedicel wider than flagellum, hemispheric; flagellomeres cylindrical, with lengths about equal to widths. Sc ends at C at level of base of R 2+3. R 1 almost straight, R 2+3 sigmoid, curved anteriorly at apex. R 4 and R 5 curved posteriorly. R 2+3 2X the length of the basal section of RS. Length of basal section of RS 2.5X that of section of RS between bases of R 2+3 and rm. M stem weak. Section of M 1+2 stem proximal to r-m 2.3X the length of stem section distal to r-m; length of M 1 and M 2 fork 3.5X that of M 1+2 stem. Apex of CuA distal to level of r-m crossvein. Cerci apparently onesegmented.

MATERIAL: Holotype VMNH 1041.

ETYMOLOGY: The species epithet is from the Latin rectus, meaning ‘‘straight’’, in reference to details of wing venation.